E-ZK Corpse Caller (Permanent)–This special grenade lures zombies, then explodes them into icky bits. Attracts undead enemies in Kill Every Thing, Paranormal Ops, and Threshold Defense modes. (You can only carry one corpse caller at a time.)

M67 Assault Grenade (Permanent)–This simple weapon utilizes a six-step arming and throwing sequence. In other words, pull the pin and throw it as far as you can. Deals additional damage to enemies in Assault, Massive Assault, Assault Ops, and Threshold Defense modes.

Platinum Bullet (×3)–Use to enter the Platinum Shooting Gallery and win a special prize! Prizes include turrets or permanent and temporary versions of rare Assault and ZK weapons that deal additional damage to certain enemy types in co-operative modes.